Endocrine Abstracts

Successful crystallization of TSHR residues 21–260 has been reported (Sanders et al. Thyroid 2007 17 395) using a partial ectodomain (ECD) bound to the Fab fragment of a human stimulating TSHR monoclonal antibody (M22) and its conformational epitopes delineated. We have now studied antibody binding to the entire ECD (residues 1–412) using epitope protection. In this approach, we first protected a highly purified ectodomain fragment with a variety...